<template>
  <div class="component-upload-image">
    <el-upload
      multiple
      :action="uploadImgUrl"
      list-type="picture-card"
      :on-change="handleChange"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      name="file"
      ref="imageUpload"
      :on-remove="handleRemove"
      :show-file-list="true"
      :headers="headers"
      :file-list="fileList"
      :on-preview="handlePictureCardPreview"
      :class="{ hide: fileList.length >= limit }"
      :disabled="disabled"
    >
      <el-icon class="avatar-uploader-icon"><plus /></el-icon>
    </el-upload>
    <!-- 上传提示 -->
    <div class="el-upload__tip" v-if="showTip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>

    <el-dialog
      v-model="dialogVisible"
      title="预览"
      width="800px"
      append-to-body
    >
      <!--<img
        :src="dialogImageUrl"
        style="display: block; max-width: 100%; margin: 0 auto"
      />-->
      <!--开启预览大图的功能-->
      <el-image
          style="display: block; max-width: 100%; margin: 0 auto"
          :src="dialogImageUrl"
          :preview-src-list="srcList"
      />
    </el-dialog>
  </div>
</template>

<script setup>
import { getToken } from "@/utils/auth.js";
import { upLoadFile, downLoadFile, deleteFile } from "@/api/system/attachFile.js";

const props = defineProps({
  modelValue: [String, Object, Array],
  // 图片数量限制
  limit: {
    type: Number,
    default: 5,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 100,
  },
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array,
    default: () => ["png", "jpg", "jpeg"],
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
  disabled: {
	  type: Boolean,
	  default: false
	},
  showUploadList: {
    type: Object,
	},
  showDelIcon: {
    type: Boolean,
    default:true,
	},
});

const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const srcList = ref([]);
const dialogImageUrl = ref("");
const dialogVisible = ref(false);
const baseUrl = import.meta.env.VITE_APP_BASE_API;
const uploadImgUrl = ref(import.meta.env.VITE_APP_BASE_API + "/attachment/uploadFile"); // 上传的图片服务器地址
const headers = ref({ token: "token " + getToken() });
const fileList = ref([]);
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);

watch(() => props.modelValue, val => {
  if (val) {
    // 首先将值转为数组
    const list = Array.isArray(val) ? val : props.modelValue.split(",");
    // 然后将数组转为对象数组
    fileList.value = list.map(item => {
      if (typeof item === "string") {
        let url = import.meta.env.VITE_APP_BASE_API + "/attachment/downLoadFile?attachId="+ encodeURIComponent(item);
        item = { attachId:item, name: item, url: url };
      }
      // item.name = item.attachName;
      // item.url = import.meta.env.VITE_APP_BASE_API + "/attachment/downLoadFile?attachId="+ encodeURIComponent(item.attachId)

      return item;
    });
  } else {
    fileList.value = [];
    return [];
  }
},{ deep: true, immediate: true });

// 删除图片
function handleRemove(file, files) {
  //emit("update:modelValue", listToString(fileList.value));\
  emit('delImage', fileList.value);
  // deleteFile(file.attachId).then(res => {
	// 	    //console.log(res)
  // 	if (res.code==200) {
  //       proxy.$modal.msgSuccess("删除图片成功");
  //       emit('delImage', fileList.value);
  //   }else{
  //       proxy.$modal.msgError("删除图片失败");
        
  //   }
	// });
}

function handleChange(file, fileList) {
//	console.log(baseUrl)
//	console.log(JSON.parse(JSON.stringify(file)))
//	console.log(JSON.parse(JSON.stringify(fileList)))
	fileList.value = fileList;
}

// 上传成功回调
function handleUploadSuccess(res) {
	uploadList.value.push({ attachId: res.data[0].attachId, name: res.data[0].attachName, url: import.meta.env.VITE_APP_BASE_API + "/attachment/downLoadFile?attachId="+ encodeURIComponent(res.data[0].attachId) });
//	console.log(uploadList.value.length)
//	console.log(fileList.value)
	if (uploadList.value.length === number.value) {
	    fileList.value = fileList.value.filter(f => f.attachId !== undefined).concat(uploadList.value);
	    uploadList.value = [];
	    number.value = 0;
	    //emit("update:modelValue", listToString(fileList.value));
	    proxy.$modal.closeLoading();
	    proxy.$modal.msgSuccess("上传图片成功");
      emit('uploadImage', fileList.value)
	    //proxy.$refs.imageUpload.clearValidate();
	}
}

// 上传前loading加载
function handleBeforeUpload(file) {
  let isImg = false;
  if (props.fileType.length) {
    let fileExtension = "";
    if (file.name.lastIndexOf(".") > -1) {
      fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
    }
    isImg = props.fileType.some(type => {
      if (file.type.indexOf(type) > -1) return true;
      if (fileExtension && fileExtension.indexOf(type) > -1) return true;
      return false;
    });
  } else {
    isImg = file.type.indexOf("image") > -1;
  }
  if (!isImg) {
    proxy.$modal.msgError(
      `文件格式不正确, 请上传${props.fileType.join("/")}图片格式文件!`
    );
    return false;
  }
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.msgError(`上传图片大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  proxy.$modal.loading("正在上传图片，请稍候...");
  number.value++;
}

// 文件个数超出
function handleExceed() {
  proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}

// 上传失败
function handleUploadError() {
  proxy.$modal.msgError("上传图片失败");
  proxy.$modal.closeLoading();
}

// 预览
function handlePictureCardPreview(file) {
  dialogImageUrl.value = file.url;
  dialogVisible.value = true;
  srcList.value = [file.url];
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if (undefined !== list[i].url && list[i].url.indexOf("blob:") !== 0) {
      strs += list[i].url.replace(baseUrl, "") + separator;
    }
  }
  return strs != "" ? strs.substr(0, strs.length - 1) : "";
}
defineExpose({
  fileList
});
</script>

<style lang="scss" scoped>
  .hide {
    :deep(.el-upload--picture-card){
      display: none !important;
    }
  }
</style>